Measurement of the decay B0 → D*+τ– ντ [ Branching fraction ratio B0 → D*+τ– ντ/ B0 → D*+μ– νμ = 0.336±0.027±0.030 ] Today, at the 13th Flavor Physics and CP violation conference in Nagoya (Japan), the LHCb collaboration presented the preliminary result from a measurement of the branching fraction ratio R(D*): B0 → D*+τ–…